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svetoff [14.1K]
3 years ago
5

What is the purpose of a primary key?

Computers and Technology
1 answer:
tia_tia [17]3 years ago
4 0

Answer:

 Primary key:

A primary key is the collection of field value which persist unique value in the table. The primary key value can be use to represent the entire record throughout the table. In the database, each table only contain one primary key.

 The purpose of the primary key is used to implemented the relationship within the two tables in the database. More explicitly the primary key is define as, primary key is "target" that the foreign key can easily referenced. It basically consist multiple attributes in the table.

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Write a function `has_more_zs` to determine which of two strings contains # more instances of the letter "z". It should take as
nekit [7.7K]

Answer:

// Method's name: has_more_zs

// Parameters are text1 and text2 to hold the two phrases to be tested

public static String has_more_zs(String text1, String text2) {

 // Create and initialize z1 to zero

 // Use z1 to count the number of zs in text1

 int z1 = 0;

 // Create and initialize z2 to zero

 // Use z2 to count the number of zs in text2

 int z2 = 0;

 

 //Create a loop to cycle through the characters in text1

 //Increment z1 by one if the current character is a 'z'

 int i = 0;

 while (i < text1.length()) {

  if (text1.charAt(i) == 'z' || text1.charAt(i) == 'Z') {

   z1 += 1;

  }

  i++;

 }

 //Create a loop to cycle through the characters in text2

 //Increment z2 by one if the current character is a 'z'

 

 i = 0; //Re-initialize i to zero

 

 while (i < text2.length()) {

  if (text2.charAt(i) == 'z' || text2.charAt(i) == 'Z') {

   z2 += 1;

  }

  i++;

 }

 

 

 //Using the values of z1 and z2, return the necessary statements

 if (z1 > z2) {

  return "The phrase '" + text1 + "'" + " has more occurences of z than the phrase " + "'" + text2 + "'";

 }

 else if (z1 < z1) {

  return "The phrase '" + text2 + "'" + " has more occurences of z than the phrase " + "'" + text1 + "'";

 }

 else if (z1 == z2) {

  return "The strings have the same number of z";

 }

 else {

  return "Neither string contains the the letter z";

 }

}

Explanation:

Explanation to answer has been given in the code as comments. Please refer to the comments for the details of the code.

The source code file has been attached to this response and saved as "NumberOfZs.java"

Hope this helps!

Download java
5 0
3 years ago
I need the answer ASAP. I’ll mark brainliest if right
Kisachek [45]

Answer:

copy or repeat

Explanation:

7 0
2 years ago
Speech about society being normal
Kisachek [45]

Answer:

Do you know what is best about America? It’s really the fact that the right to equality has been ensured at the maximum level, and for all. And the citizens respect their family and this is being showcased proudly by Sir Donald Trump who not only looks after the whole US without ever hesitating no matter whatever might be the issue and at the same time also look after his great and proven proud family. And that explains in itself why America is so great. And this is a perfect specimen of an inordinate democracy, and that is why American Democracy is so fruitful. There is sufficient money, all sorts of resources, the most influential military, and the world's finest technology. And American history can be a petite one, but it is one of the most noticeable histories in the entire world. You will not find such a great history in any other part of the world. And George Washington, the father of the country set such an example that the next various generations of great leaders were able to build such a great America. It is a society where every citizen enjoys equal rights, and a day before Sir Trump issued various prisoners with graduate degrees, to help them to return to the mainstream of life. No other society in the whole world enjoys such a level of privileges on behalf of equality. And that’s why the US society can be termed as the most normal in the whole world.

Explanation:

Please check the answer section. And I have chosen US as it is the most fruitful democracy of the world. And I feel all the counrtries from the entire world, should learn a lesson from the short history of United States. This is the way in which we can sight a normal society.

3 0
3 years ago
Write a program to prepare the monthly charge account statement for a customer of CS CARD International, a credit card company.
WITCHER [35]

Answer:

import java.util.*;

import java.text.*;

class CreditCardBill

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

NumberFormat defaultFormat = NumberFormat.getCurrencyInstance(Locale.US);

System.out.println("CS Card International Statement");

System.out.println("===============================");

System.out.print("Previous Balance: $");

double prevBalance = sc.nextDouble();

System.out.print("Additional Charges: $");

double addCharges = sc.nextDouble();

double interest;

if(prevBalance == 0)

interest = 0;

else

interest = (prevBalance + addCharges) * 0.02;

System.out.println("Interest: "+defaultFormat.format(interest));

double newBalance = prevBalance + addCharges + interest;

System.out.println("New Balance: "+defaultFormat.format(newBalance));

double minPayment;

if(newBalance < 50)

minPayment = newBalance;

else if(newBalance <= 300)

minPayment = 50.00;

else

minPayment = newBalance * 0.2;

System.out.println("Minimum Payment: "+defaultFormat.format(minPayment));

}

}

5 0
3 years ago
A cell reference in a formula allows you to point to another cell location
mario62 [17]

The cell reference refers to a cell on a worksheet and can be used in a formula to point another location.

Explanation:

A cell reference is a range of cells on a worksheet that can be used in a formula to find the values or data you want to calculate using that formula.

There are two types of cell references relative and absolute. they both behave differently when copied to other cells. Relative references change when a formula is copied to another cell.

Absolute reference remains constant even if they are copied. In a formula multiplications are performed before subtraction.

It does not change when the formula is copied or moved to another cell.

6 0
3 years ago
Read 2 more answers
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